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Total 8 documents matching your query.

1. [Amps] Alpha 78 won't turn off (score: 1): Author: CHUCK CULLIAN <k6rf@aol.com>; Date: Tue, 20 Sep 2011 11:07:40 -0400 (EDT); I have an Alpha 78 that wouldn't turn on and I found that a 10K power resistor that dropped the 220 down to 110 to turn on the main relay was open. When I replaced it, the amp came on but when the of; /archives//html/Amps/2011-09/msg00146.html (6,543 bytes)
2. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: Jim Barber <audioguy@q.com>; Date: Thu, 22 Sep 2011 10:22:00 -0700; I have a 76A that does this once in a while as well. If there's a known cause, please post to the list! Thanks, Jim N7CXI _______________________________________________ Amps mailing list Amps@contes; /archives//html/Amps/2011-09/msg00147.html (7,270 bytes)
3. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 22 Sep 2011 14:11:46 -0400; Sounds like K1 has welded contacts and it is a family affair as the 76 series has the same circuit. A semi PITA to replace as its down low and behind the front panel. Carl KM1H ______________________; /archives//html/Amps/2011-09/msg00148.html (8,647 bytes)
4. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: Jim Barber <audioguy@q.com>; Date: Thu, 22 Sep 2011 11:16:59 -0700; I suppose in the case of my 76A it could be "sticky" contacts, since it only does it when warm after usage, and then only sometimes. Carl, you wouldn't happen to know of a good replacement off the to; /archives//html/Amps/2011-09/msg00149.html (9,558 bytes)
5. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: Robert Friess <rfriess@usa.net>; Date: Thu, 22 Sep 2011 11:32:26 -0700; I have a 87A that has a slightly different problem. When plugged in, but turned off, occasionally a relay starts to chatter randomly. It goes on for a few seconds and then stops until the next time.; /archives//html/Amps/2011-09/msg00150.html (10,128 bytes)
6. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 22 Sep 2011 15:01:13 -0400; The parts list gives make and model. I believe I found an equivalent at Mouser or Digi Key the last time once I removed the old one and measured dimensions. Carl KM1H ________________________________; /archives//html/Amps/2011-09/msg00151.html (10,528 bytes)
7. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 22 Sep 2011 15:01:47 -0400; It would help to know what relay I have a 87A that has a slightly different problem. When plugged in, but turned off, occasionally a relay starts to chatter randomly. It goes on for a few seconds and; /archives//html/Amps/2011-09/msg00152.html (10,630 bytes)
8. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Thu, 22 Sep 2011 16:31:08 -0400; This may not be one of them, but some amps and relay/LC based tuners "Exercise" their relays from time to time, even when turned of. It tends to make the not so often used ones stay motive and contac; /archives//html/Amps/2011-09/msg00153.html (11,822 bytes)

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